/// <summary>
/// Dispose
/// </summary>
public void Dispose()
{
if (audioClientInterface != null)
{
if (audioClockClient != null)
{
audioClockClient.Dispose();
audioClockClient = null;
}
if (audioRenderClient != null)
{
audioRenderClient.Dispose();
audioRenderClient = null;
}
if (audioCaptureClient != null)
{
audioCaptureClient.Dispose();
audioCaptureClient = null;
}
if (audioStreamVolume != null)
{
audioStreamVolume.Dispose();
audioStreamVolume = null;
}
Marshal.ReleaseComObject(audioClientInterface);
audioClientInterface = null;
GC.SuppressFinalize(this);
}
}
private void ReadNextPacket(AudioCaptureClient capture)
{
IntPtr buffer;
int framesAvailable;
AudioClientBufferFlags flags;
int packetSize = capture.GetNextPacketSize();
int recordBufferOffset = 0;
//Debug.WriteLine(string.Format("packet size: {0} samples", packetSize / 4));
while (packetSize != 0)
{
buffer = capture.GetBuffer(out framesAvailable, out flags);
int bytesAvailable = framesAvailable * bytesPerFrame;
//Debug.WriteLine(string.Format("got buffer: {0} frames", framesAvailable));
// if not silence...
if ((flags & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer, recordBuffer, recordBufferOffset, bytesAvailable);
}
else
{
Array.Clear(recordBuffer, recordBufferOffset, bytesAvailable);
}
recordBufferOffset += bytesAvailable;
capture.ReleaseBuffer(framesAvailable);
packetSize = capture.GetNextPacketSize();
}
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(recordBuffer, recordBufferOffset));
}
}
private void DoRecording(AudioClient client)
{
int bufferSize = client.BufferSize;
long num = (long)(10000000.0 * (double)bufferSize / (double)this.waveFormat.SampleRate);
int millisecondsTimeout = (int)(num / 10000L / 2L);
int millisecondsTimeout2 = (int)(3L * num / 10000L);
AudioCaptureClient audioCaptureClient = client.AudioCaptureClient;
client.Start();
if (this.isUsingEventSync)
{
}
while (!this.requestStop)
{
bool flag = true;
if (this.isUsingEventSync)
{
flag = this.frameEventWaitHandle.WaitOne(millisecondsTimeout2, false);
}
else
{
Thread.Sleep(millisecondsTimeout);
}
if (!this.requestStop && flag)
{
this.ReadNextPacket(audioCaptureClient);
}
}
}
public override void Exit()
{
capClient.Dispose();
capClient = null;
audioClient.Stop();
audioClient.Dispose();
audioClient = null;
}
private void ReadNextPacket(AudioCaptureClient capture)
{
int packetSize = capture.GetNextPacketSize();
int recordBufferOffset = 0;
//Debug.WriteLine(string.Format("packet size: {0} samples", packetSize / 4));
while (packetSize != 0)
{
int framesAvailable;
AudioClientBufferFlags flags;
IntPtr buffer = capture.GetBuffer(out framesAvailable, out flags);
int bytesAvailable = framesAvailable * bytesPerFrame;
// apparently it is sometimes possible to read more frames than we were expecting?
// fix suggested by Michael Feld:
int spaceRemaining = Math.Max(0, recordBuffer.Length - recordBufferOffset);
if (spaceRemaining < bytesAvailable && recordBufferOffset > 0)
{
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(recordBuffer, recordBufferOffset));
}
recordBufferOffset = 0;
}
if ((flags & AudioClientBufferFlags.DataDiscontinuity) == AudioClientBufferFlags.DataDiscontinuity)
{
Debug.WriteLine("DataDiscontinuity flagged!");
}
// if not silence...
if ((flags & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer, recordBuffer, recordBufferOffset, bytesAvailable);
}
else
{
Array.Clear(recordBuffer, recordBufferOffset, bytesAvailable);
}
recordBufferOffset += bytesAvailable;
capture.ReleaseBuffer(framesAvailable);
packetSize = capture.GetNextPacketSize();
}
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(recordBuffer, recordBufferOffset));
}
}
private void CaptureThread(AudioClient client)
{
Debug.WriteLine(client.BufferSize);
int bufferFrameCount = audioClient.BufferSize;
// Calculate the actual duration of the allocated buffer.
long actualDuration = (long)((double)REFTIMES_PER_SEC *
bufferFrameCount / WaveFormat.SampleRate);
int sleepMilliseconds = (int)(actualDuration / REFTIMES_PER_MILLISEC / 2);
AudioCaptureClient capture = client.AudioCaptureClient;
client.Start();
try
{
Debug.WriteLine(string.Format("sleep: {0} ms", sleepMilliseconds));
while (!this.stop)
{
Thread.Sleep(sleepMilliseconds);
ReadNextPacket(capture);
}
client.Stop();
if (RecordingStopped != null)
{
RecordingStopped(this, EventArgs.Empty);
}
}
finally
{
if (capture != null)
{
capture.Dispose();
}
if (client != null)
{
client.Dispose();
}
client = null;
capture = null;
}
System.Diagnostics.Debug.WriteLine("stop wasapi");
}
private void DoRecording(AudioClient client)
{
Debug.WriteLine(String.Format("Client buffer frame count: {0}", client.BufferSize));
int bufferFrameCount = client.BufferSize;
// Calculate the actual duration of the allocated buffer.
long actualDuration = (long)((double)REFTIMES_PER_SEC *
bufferFrameCount / waveFormat.SampleRate);
int sleepMilliseconds = (int)(actualDuration / REFTIMES_PER_MILLISEC / 2);
int waitMilliseconds = (int)(3 * actualDuration / REFTIMES_PER_MILLISEC);
AudioCaptureClient capture = client.AudioCaptureClient;
client.Start();
if (isUsingEventSync)
{
Debug.WriteLine(string.Format("wait: {0} ms", waitMilliseconds));
}
else
{
Debug.WriteLine(string.Format("sleep: {0} ms", sleepMilliseconds));
}
while (!this.requestStop)
{
bool readBuffer = true;
if (isUsingEventSync)
{
readBuffer = frameEventWaitHandle.WaitOne(waitMilliseconds, false);
}
else
{
Thread.Sleep(sleepMilliseconds);
}
// If still playing and notification is ok
if (!this.requestStop && readBuffer)
{
ReadNextPacket(capture);
}
}
}
private void DoRecording(AudioClient client)
{
Debug.WriteLine(client.BufferSize);
int bufferFrameCount = audioClient.BufferSize;
// Calculate the actual duration of the allocated buffer.
long actualDuration = (long)((double)REFTIMES_PER_SEC *
bufferFrameCount / WaveFormat.SampleRate);
int sleepMilliseconds = (int)(actualDuration / REFTIMES_PER_MILLISEC / 2);
AudioCaptureClient capture = client.AudioCaptureClient;
client.Start();
Debug.WriteLine(string.Format("sleep: {0} ms", sleepMilliseconds));
while (!this.stop)
{
Thread.Sleep(sleepMilliseconds);
ReadNextPacket(capture);
}
}
private void ReadNextPacket(AudioCaptureClient capture)
{
int nextPacketSize = capture.GetNextPacketSize();
int num = 0;
while (nextPacketSize != 0)
{
int num2;
AudioClientBufferFlags audioClientBufferFlags;
IntPtr buffer = capture.GetBuffer(out num2, out audioClientBufferFlags);
int num3 = num2 * this.bytesPerFrame;
int num4 = Math.Max(0, this.recordBuffer.Length - num);
if (num4 < num3 && num > 0)
{
if (this.DataAvailable != null)
{
this.DataAvailable(this, new WaveInEventArgs(this.recordBuffer, num));
}
num = 0;
}
if ((audioClientBufferFlags & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer, this.recordBuffer, num, num3);
}
else
{
Array.Clear(this.recordBuffer, num, num3);
}
num += num3;
capture.ReleaseBuffer(num2);
nextPacketSize = capture.GetNextPacketSize();
}
if (this.DataAvailable != null)
{
this.DataAvailable(this, new WaveInEventArgs(this.recordBuffer, num));
}
}
private void CaptureThread(AudioClient client)
{
Debug.WriteLine(client.BufferSize);
int bufferFrameCount = audioClient.BufferSize;
// Calculate the actual duration of the allocated buffer.
var actualDuration = (long)((double)REFTIMES_PER_SEC *
bufferFrameCount / WaveFormat.SampleRate);
var sleepMilliseconds = (int)(actualDuration / REFTIMES_PER_MILLISEC / 2);
AudioCaptureClient capture = client.AudioCaptureClient;
client.Start();
try
{
Debug.WriteLine(string.Format("sleep: {0} ms", sleepMilliseconds));
while (!stop)
{
Thread.Sleep(sleepMilliseconds);
ReadNextPacket(capture);
}
}
finally
{
client.Stop();
if (RecordingStopped != null)
{
RecordingStopped(this, EventArgs.Empty);
}
// don't dispose - the AudioClient only gets disposed when WasapiCapture is disposed
}
Debug.WriteLine("stop wasapi");
}
/// <summary>
/// Dispose
/// </summary>
public void Dispose()
{
if (audioClientInterface != null)
{
if (audioRenderClient != null)
{
audioRenderClient.Dispose();
audioRenderClient = null;
}
if (audioCaptureClient != null)
{
audioCaptureClient.Dispose();
audioCaptureClient = null;
}
Marshal.ReleaseComObject(audioClientInterface);
audioClientInterface = null;
GC.SuppressFinalize(this);
}
}
private void ReadNextPacket(AudioCaptureClient capture)
{
IntPtr buffer;
int framesAvailable;
AudioClientBufferFlags flags;
int packetSize = capture.GetNextPacketSize();
int recordBufferOffset = 0;
//Debug.WriteLine(string.Format("packet size: {0} samples", packetSize / 4));
while (packetSize != 0)
{
buffer = capture.GetBuffer(out framesAvailable, out flags);
int bytesAvailable = framesAvailable * bytesPerFrame;
// apparently it is sometimes possible to read more frames than we were expecting?
// fix suggested by Michael Feld:
int spaceRemaining = Math.Max(0, recordBuffer.Length - recordBufferOffset);
if (spaceRemaining < bytesAvailable && recordBufferOffset > 0)
{
if (DataAvailable != null)
DataAvailable(this, new WaveInEventArgs(recordBuffer, recordBufferOffset));
recordBufferOffset = 0;
}
// if not silence...
if ((flags & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer, recordBuffer, recordBufferOffset, bytesAvailable);
}
else
{
Array.Clear(recordBuffer, recordBufferOffset, bytesAvailable);
}
recordBufferOffset += bytesAvailable;
capture.ReleaseBuffer(framesAvailable);
packetSize = capture.GetNextPacketSize();
}
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(recordBuffer, recordBufferOffset));
}
}
private void ReadNextPacket(AudioCaptureClient capture)
{
IntPtr buffer;
int framesAvailable;
AudioClientBufferFlags flags;
int packetSize = capture.GetNextPacketSize();
int recordBufferOffset = 0;
//Debug.WriteLine(string.Format("packet size: {0} samples", packetSize / 4));
while (packetSize != 0)
{
buffer = capture.GetBuffer(out framesAvailable, out flags);
int bytesAvailable = framesAvailable * bytesPerFrame;
//Debug.WriteLine(string.Format("got buffer: {0} frames", framesAvailable));
// if not silence...
if ((flags & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer, recordBuffer, recordBufferOffset, bytesAvailable);
}
else
{
Array.Clear(recordBuffer, recordBufferOffset, bytesAvailable);
}
recordBufferOffset += bytesAvailable;
capture.ReleaseBuffer(framesAvailable);
packetSize = capture.GetNextPacketSize();
}
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(recordBuffer, recordBufferOffset));
}
}
private void InitializeAudioClient()
{
var enumerator = new MMDeviceEnumerator();
var captureDevice = enumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
audioClient = captureDevice.AudioClient;
int recordBufferLength = samplingRate; // 20ms worth of recording
recordBuffer = new float[recordBufferLength * channelCount];
long requestedDuration = 10000 * period * 2;
audioClient.Initialize(AudioClientShareMode.Shared,
AudioClientStreamFlags.Loopback,
requestedDuration,
0,
WaveFormat.CreateIeeeFloatWaveFormat(samplingRate, channelCount),
Guid.Empty);
capClient = audioClient.AudioCaptureClient;
audioClient.Start();
}
private void ReadNextPacket2(AudioCaptureClient capture1, AudioCaptureClient capture2)
{
int packetSize1 = capture1.GetNextPacketSize();
int packetSize2 = capture2.GetNextPacketSize();
int recordBufferOffset = 0;
int recordBufferOffset2 = 0;
while (packetSize1 != 0 || packetSize2 != 0)
{
int framesAvailable1;
AudioClientBufferFlags flags1;
int framesAvailable2;
AudioClientBufferFlags flags2;
IntPtr buffer1 = capture1.GetBuffer(out framesAvailable1, out flags1);
IntPtr buffer2 = capture2.GetBuffer(out framesAvailable2, out flags2);
int bytesAvailable1 = framesAvailable1 * bytesPerFrame;
int bytesAvailable2 = framesAvailable2 * bytesPerFrame2;
// apparently it is sometimes possible to read more frames than we were expecting?
// fix suggested by Michael Feld:
int spaceRemaining = Math.Max(0, recordBuffer.Length - recordBufferOffset);
int spaceRemaining2 = Math.Max(0, recordBuffer2.Length - recordBufferOffset2);
if ((spaceRemaining < bytesAvailable1 && recordBufferOffset > 0) || (spaceRemaining2 < bytesAvailable2 && recordBufferOffset2 > 0))
{
int outputIndex = 0;
int maxLen = Math.Max(recordBufferOffset, recordBufferOffset2);
var destWaveBuffer = new WaveBuffer(new byte[maxLen]);
for (int i = 0; i < maxLen; i += 4)
{
float a, b;
if (i < recordBuffer.Length)
{
a = BitConverter.ToSingle(recordBuffer, i);
}
else
{
a = 0;
}
if (i < recordBuffer2.Length)
{
b = BitConverter.ToSingle(recordBuffer2, i);
}
else
{
b = 0;
}
float c = a + b;
if (c >= 1.0f)
{
c = 1.0f;
}
else if (c <= -1.0f)
{
c = -1.0f;
}
destWaveBuffer.ShortBuffer[outputIndex++] = (short)(c * 32767);
}
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(destWaveBuffer.ByteBuffer, maxLen / 2));
}
recordBufferOffset = 0;
recordBufferOffset2 = 0;
}
// if not silence...
if (packetSize1 != 0 && (flags1 & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer1, recordBuffer, recordBufferOffset, bytesAvailable1);
}
if (packetSize2 != 0 && (flags2 & AudioClientBufferFlags.Silent) != AudioClientBufferFlags.Silent)
{
Marshal.Copy(buffer2, recordBuffer2, recordBufferOffset2, bytesAvailable2);
}
if ((flags1 & AudioClientBufferFlags.Silent) == AudioClientBufferFlags.Silent)
{
Array.Clear(recordBuffer, recordBufferOffset, bytesAvailable1);
}
if ((flags2 & AudioClientBufferFlags.Silent) == AudioClientBufferFlags.Silent)
{
Array.Clear(recordBuffer2, recordBufferOffset2, bytesAvailable2);
}
recordBufferOffset += bytesAvailable1;
recordBufferOffset2 += bytesAvailable2;
capture1.ReleaseBuffer(framesAvailable1);
capture2.ReleaseBuffer(framesAvailable2);
packetSize1 = capture1.GetNextPacketSize();
packetSize2 = capture2.GetNextPacketSize();
}
if (DataAvailable != null)
{
int outputIndex = 0;
int maxLen = Math.Max(recordBufferOffset, recordBufferOffset2);
var destWaveBuffer = new WaveBuffer(new byte[maxLen / 2]);
for (int i = 0; i < maxLen; i += 4)
{
float a, b;
if (i < recordBuffer.Length)
{
a = BitConverter.ToSingle(recordBuffer, i);
}
else
{
a = 0;
}
if (i < recordBuffer2.Length)
{
b = BitConverter.ToSingle(recordBuffer2, i);
}
else
{
b = 0;
}
float c = a + b;
if (c >= 1.0f)
{
c = 1.0f;
}
else if (c <= -1.0f)
{
c = -1.0f;
}
destWaveBuffer.ShortBuffer[outputIndex++] = (short)(c * 32767);
}
DataAvailable(this, new WaveInEventArgs(destWaveBuffer.ByteBuffer, maxLen / 2));
}
}
